I asked on the net and
was told this was inferior even to geforce3. Back to the shop
where the manager insisted that was nonsense and the FX5200 was
better than gforce 4. He was so certain he literally signed my
receipt, "better than geforce 4 - (next level up)"

FX5200 is slower than GeForce3 ti500 for sure! however, if it is FX5200
(64-BIT - important) than it's way slower than even GeForce2 GTS/Pro or
Radeon7500.
GeForce4 TI4200 is lot lot faster than 5200 series, even 5200Ultra is slower
than 4200..

The manager is an idiot! Or trying to skrew you